Effervescent tablets as an alternative to squash

An advantage of squash over other soft drinks is that much of the water content is provided at point-of-use, and therefore is not transported. Hence lower transport cost, and smaller environmental impact.

I wonder whether it's possible to take this concept further, and package squash into effervescent tablets. Such tablets are already extensively used to deliver medicine and dietary products. Consumers would drop one or more tablets (depending on glass size) into a glass of water, resulting in a flavored drink.